A 15.0 k ohms resistor and a capacitor are connected in series, and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 5.00 V in 1.30 micro second. (a) Calculate the time constant of the circuit. (b) Find the capacitance of the capacitor.

A 15.0 k ohms resistor and a capacitor are connected in series, and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 5.00 V in 1.30 micro second. (a) Calculate the time constant of the circuit. (b) Find the capacitance of the capacitor.